the big moment of truth... black has to play 13...g6. But doesn't 13... Rc8 look reasonable?

13....Rc814.d5!! exd515.Bg5 g6

16.Rxe7! Qxe7 [16...Nxe7 17.Bxf6]17.Nxd5 +/-

So first round at the Marshall, Randy Rivera

Randy

gets the position in the first diagram against an 1880, but after 13... Rc8, plays 14. Bg5 and goes on to lose. First I was annoyed that he forgot, then I was smugly elated at the idea that my students would see how preternaturally relevant my class lessons are. Also James,

got paired against the same guy in round three and he has a much better memory.